Alpha ALPHA6000 Series - 5.14 Protection and Fault Parameters (Group Pd)

Chapter 5 Parameter Introductions
http://www.acdrive-china.com
179
◆Linear speed = Running frequency × PC.22 (non PG)
◆Linear speed = rotate speed × PC.22 (PG)
◆Reference linear speed= reference frequency* PC.22 (non PG)
◆Reference linear speed= reference speed × PC.22 (PG)
 Tips:
The range of Display:
Linear speed and Reference: 0.000～65.53m/s
Output power 0～999.9 kW
Output torque 0～300.0%
Output voltage 0～999.9V
Bus voltage 0～1000V
AI1/AI2 0.00～10.00V
External counting value 0～65530
Actual length/Preset length 0.001～65.53m
5.14 Protection and Fault Parameters (Group Pd)
Pd.00 Motor overload protection mode
selection
Range: 0～2【1】
0: Disabled
1: Common motor (with low speed compensation)
2: Variable frequency motor (without low speed compensation)
Note:
◆Disabled
The overload protection is disabled. Be careful to use this function because the ac
drive will not protect the ac motor when overload occurs;
◆Common mode (with low speed compensation)
Since the cooling effects of common motor deteriorates at low speed (below 30 Hz),
the motor’s overheat protecting threshold should be lowered, which is called low
speed compensation.
◆Variable frequency motor (without low speed compensation)
The cooling effects of variable frequency motor are not affected by the motor’s speed,
so low speed compensation is not necessary.
Pd.01 Electro-thermal protective value
Range: 20～110%【100%】
Note:
◆In order to apply effective overload protection to different kinds of motors, the Max
output current of the ac drive should be adjusted as shown in Fig.5-13-1.